There are three reliable ways to locate the official :
The front panel is dominated by the SMPTE Fiber connector and the LCD screen . Placing the fiber connection on the front eliminates the need for expensive fiber patch panels on the rear of your rack. 3. Connection Guide
If you are using an older firmware version (e.g., 4.5 or earlier), you may need the "Legacy" manual. Blackmagic archives these under the "Older Products" section at the bottom of the support page.
Setting Switch 1 to "Multi-Camera" without setting up your return fiber loops. The manual warns that without a physical loopback on the unused ports, the unit will fail to sync.